1. A system or network of electrical circuits or equipment designed to operate together.
a. A configuration of mechanical parts or devices providing a link between a supply source and a user: a gas hookup for a mobile home.
b. A plan or schematic drawing of such a system or such a configuration.
3. Informal A linkage or connection, often between unlikely associates or factors.
a. An act of casual sex.
b. A partner in an act of casual sex.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.